Coil-winding form



8. ROGERS.

COIL WINDING FORM. APPLICATION FILED um. |s. |919.

Patented July 27, 1920 UNITED STATES PATENT OFFICE.

SAMUEL ROGERS, OF ANDERSON, INDIANA, ASSIGNOR TO THE REMY ELECTRIC COMPANY, A CORPORATION OF INDIANA.

Specification of Letters Patent.

COIL-WINDING FORM.

Patented July 2'7, 1920.

Application filed January 15, 1919. Serial No. 271,289.

To all whom it may concern:

Be it known that I, SAMUEL Rooeus, a citizen of the United States of America, residing at Anderson, county of Madison, State of Indiana, have invented certain new and useful Improvements in Coil-Winding Forms, of which the following is a full, clear, and exact description.

This invention relates to devices for forming coils of wire comprising a plurality of layers and a plurality of turns of wire in each layer.

It is common practice, as for example, in the construction of electric generators, to form the field coils before placing them in position on the pole pieces, instead of winding the wire directly onto the pole pieces. 111 many cases it is desirable to provide a coil in which the number of turns per layer is smaller in comparison to the number of layers employed, that is, the cross section of the coil will have its shortest dimension parallcl to the axis of the coil. It has been the practice, where such coils are to be formed, to provide a winding form consisting of a relatively short core member upon which the windings are wound, and relatively large flange portions, so that the depth of the groove formed by the flanges and the core is relatively greater than the width of the groove. Such a form is generally mounted on a rotating spindle and the wire is generally fed on by hand as the spindle rotates. Considerable dilliculty has been experienced in winding the wire on such a form properly, that is, winding the layers absolutely level and with the turns spaced the proper distance apart so that none of the turns of a single layer over-lap any of the others, or drop in between the turns of the preceding layers.

I have discovered that this difficulty is largely due to the fact that the turns of the first or bottom layer of wire which come next to the core are not wound properly, that is. with the turns properly spaced and so hold. I have found also that even where the turns are equally spaced that, when the second layer of wire is applied over the first layer, there is a tendency for the turns of the first layer to become displaced from one another in an irregular fashion, with a result that the second layer is not perfectly level and the turns of that layer are not equally spaced especially at the finish of the layer.

If these difliculties are not overcome in the beginning the errors will be multiplied as the succeeding layers of wire are woundon the form, with a result that the coil presents an unsightly appearance when completed, and a large amount of space is wasted and the amount of wire used is not constant.

it is an object of the present invention to overcome the difficulties referred to, by prov d ng a coil winding form which has provisions for locating the turns of the va rious layers in correct relation to one an other, and so that the various layers will be properly spaced and perfectly level. More particularly it is an object of the invention to provide means for equally spacing the turns of the bottom or first layer asthey are wound on the form, and means for maintaining the turns of the first layer in spaced relation while the succeeding layers are being applied to the form. As a means of carrying out this aim, the form is provided with notches which hold the turns of the first or bottom layer of wire in correct position with one another and cause the same to be maintained in correct relation while the other turns are being applied.

Other and further objects of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a pre- Ferred embodiment of the present invention is clearly shown.

Referring to the drawings:

Figure l is a side view of the coil winding form embodying the present invention;

Fig. 2 is a side View thereof; and

Fig. 3 is a side view of one of the parts comprising the form.

leferring to the drawings the form is indicated as a whole by the reference numeral 20 and consists of flange portions 21. and 22 having attached thereto wedge shaped core portions 23 and 24. These core portions 23 and 24 are adapted to be superimposed, so as to form a core of uniform width. This core may be cylindrical in shape, rectangul r as shown in Fig. 1 or any shape which may be desired The proper location of the '='-,-.l ge shaped cores 23 and 24 is insured by the dowel pins 25 and 26 which cooperate with holes formed in said cores. The form 20 is provided with a hole 27 and a keyway 28, adapting the form to be mounted upon a mandrel having a key coiiperating with the keyway 28. The form 20 is also provided with grooves 29 along which pieces of wire or cord may be laid to be used later in tying the coil before removal from the mandrel.

The corners of the core portions 23 and 2t are provided with notched portions 30 which cooperate together to hold the wire upon the form in the manner to he described.

The use of the coil winding form is as follows:

The form 20 is placed on a mandrel l0, indicated by dot and dash lines, with the core portions 23 and 24 superimposed as shown in Fig. 2, the mandrel being provided with a shoulder 41 hearing against one of the flanges of the form, and a nut 42 by means of which the parts of the form are maintained in fixed position while the wire is being applied. One end of the wire is secured adjacent the core 23 and the flange 21 and the spindle is rotated in a counter clock-wise direction as viewed in Fig. 1. The winding takes place in a direction from top to bottom as viewed in Fig. 2, the notched portions 30 cooperating together to hold the wire in such a way that the consecutive turns of the first layer are properly spaced and the first layer is perfectly level. These notched portions serve also to maintain the turns of the first layer in correct spaced relation while the next succeeding layers are being applied. It is apparent that since the turns of the first layer are maintained in equally spaced relation, the turns of the next layer of wire will be threaded from bottom to top as viewed in Fig. 2, and will be held by the turns of the first layer in such a. manner that the turns of the second layer will he held in fixed and properly spaced relation. In like manner the turns of the second layer will hold the turns of the third layer and also maintain them in correct spaced relation. This operation will continue until the winding form is full.

When the coil is completed, the rotation of the form ceases and the cords or wire which are located in the grooves 29, are brought around and tied at the outside of the coil in order to hold the coil in position while the form is being removed. Instead of tying with cords or wires, spring clips may be placed over the coil to hold the turns in place before applying the insulation tape.

To remove the coil from the form, the form is first removed from the mandrel, then the flanges 21 and 22 are separated as by moving away from flange 22 in the direction indicated by the arrow 31. \Vhen this is done the coil can be readily removed from the core portion 24.

While the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention, it is ing guidlng provisions whereby to cause one.

flange to move obli uely to the plane of the other flange when t e core portions are separated.

2. In a coil winding form, the combination with side flanges of a core comprising separable wedge-shaped portions each attached to one of the flanges permitting the separation of the core by a movement of one gauge obliquely to the plane of the other ange.

3. In a coil winding form, the combination with side flanges o'f a core comprising separable wedge-shaped portions each attached to one of the flanges, said portions havin cooperating guiding provisions where by to cause one flange to move obliquely "to the plane of the other flange when the core portions are separated.

4:. In a coil winding form, the combination with side flanges of a core having notched wire uiding edges, said core comprising separab ewedge-sha'ped portions each attached to one of theflanges permittin the separation of the core by a movement 0% one flange obliquely to the plane of the other flange.

5. In a coil winding form, the combination with side flanges of a core having notched wire guiding edges said core comprising separable wed e-shaped portions each attached to one of the flanges, said portions having cooperating guiding provisions whereby to cause one flange to move obliquely to the plane of the other flange when the core portions are separated.

6. In a coil winding form, the combination with side flanges of a core comprising separable portions to other forming a body separatedbyadiagona lplane intersecting opposite side faces of thecore, an end face of each core portion being attached to each flange, whereby to permit separation of the core by a movement of one ange obliquely to the plane of the other flange.

7. In a coil winding form, the combination with side flanges of a core having notched wire guiding edges, said core comprising separable portions together forming a body separated by a diagonal plane intersecting op osite side faces of the core, an end face 0 each core portion being attached to each flange, whereby to permit separation of the core by a movement of one flange obliquely to the planeof the other flange.

8. In a coil winding form, the combination with side flanges of a core having notched wire guiding edges, said core comprising separable gortions together forming a body separated y a diagonal plane intersecting opposite side faces of the core, an end face of each core portion being attached to each flange, and cooperating pins and holes arranged in the core portions obliquely to the plane of the flanges whereby to cause one flange to move obliquely to the plane of the other flange when the core portions are separated.

9. In a coil Winding form, the combination with side flanges of a (ore comprising separable portions each attavhed to one of the flanges, said flanges and core portions being provided withaxially alined open- 15 ended slots extending below the Winding surface of the core.

In testimony whereof I ailix my signature.

SAMUEL ROGERS. Witnesses:

F. J. HARDMAN, J. W. MCDONALD. 

